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| author |   Lysandros Nikolaou <lisandrosnik@gmail.com> | 2020-10-31 20:31:41 +0200 |
|---|---|---|
| committer |   GitHub <noreply@github.com> | 2020-10-31 20:31:41 +0200 |
| commit | 02cdfc93f82fecdb7eae97a868d4ee222b9875d9 (patch) | |
| tree | 85ec4c7f233e9bff63b0e6af21049ec00d7e0af9 /Lib/test/test_syntax.py | |
| parent | bpo-42198: Improve consistency of Union docs (GH-23029) (diff) | |
| download | cpython-02cdfc93f82fecdb7eae97a868d4ee222b9875d9.tar.gz cpython-02cdfc93f82fecdb7eae97a868d4ee222b9875d9.tar.bz2 cpython-02cdfc93f82fecdb7eae97a868d4ee222b9875d9.zip | |
bpo-42218: Correctly handle errors in left-recursive rules (GH-23065)
Left-recursive rules need to check for errors explicitly, since
even if the rule returns NULL, the parsing might continue and lead
to long-distance failures.
Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
Diffstat (limited to 'Lib/test/test_syntax.py')
| -rw-r--r-- | Lib/test/test_syntax.py | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py index e89d9401f2c..91ca1db43a7 100644 --- a/Lib/test/test_syntax.py +++ b/Lib/test/test_syntax.py @@ -972,6 +972,14 @@ def func2(): """ self._check_error(code, "invalid syntax") + def test_invalid_line_continuation_left_recursive(self): + # Check bpo-42218: SyntaxErrors following left-recursive rules + # (t_primary_raw in this case) need to be tested explicitly + self._check_error("A.\u018a\\ ", + "unexpected character after line continuation character") + self._check_error("A.\u03bc\\\n", + "unexpected EOF while parsing") + def test_main(): support.run_unittest(SyntaxTestCase) from test import test_syntax |